SEOUL, Aug 25 (Reuters) - Korea Gas Corp (KOGAS) 036460.KS will invest 5.87 trillion won ($4.91 billion) in the Iraqi Zubair oil development and production business, the state-run South Korean gas company said in a filing to the stock exchange.

This investment is part of the total $19.4 billion capital expenditure required for the project, the company said, adding it had invested $370 million in the first half of 2015. ($1 = 1,195.7000 won)

(Reporting by Meeyoung Cho; Editing by Anupama Dwivedi) ((meeyoung.cho@thomsonreuters.com; +82 2 3704 5653; Reuters Messaging: meeyoung.cho.reuters.com@reuters.net))

Keywords: KOGAS SOUTHKOREA/IRAQ